Does this modem support modem-on-hold? If it does, how do I enable it?

Yes, this modem does support the Modem on hold feature.

To use Modem on Hold:
- You must have Call Waiting service from your telephone company.
- Your computer must be running Windows 95, 98, or Me.
- Your modem must be set to V.92 mode.
- The MTMoh program must be running.
- Enable Modem on Hold must be selected in the V.92 Modem on Hold Settings dialog box.
- Your modem must be connected to a remote server that supports V.92 and Modem on Hold. Get the latest manual for more detailed instructions at:
http://www.multitech.com/en_US/DOCUMENTS/Families/MultiModemZBA/manuals